Dar Al Batoul is a lovely place - a real gem on the outer edges of the Rabat medina, close to the Qasba des Oudaias, the river, and the sea.
The riad itself is a gorgeous place, done up in not-so-traditional colors and with each room having its own color scheme, name, and vibe. It is remarkably low-key - it took me until the second day I stayed there to realize that there was a television in one of the downstairs lounges.
The rooms are quite comfortable and spacious, and there is a very mellow reception for guests. The family who runs the riad is quite lovely - very nice, even if a bit non-communicative (mostly because only the gentleman who greets guests speaks French; the rest of the family speaks only Arabic, I believe). They are remarkably unobtrusive, and really make it clear that they are there as background to the house, the medina, and the city of Rabat. I guess this can be translated as "not a lot of service" - but if you are the kind of traveler who wants a lot of service, the more upscale riads and hotels in the ville nouvelle are going to be more to your liking.
Likewise, if you are looking for a great deal of privacy, riad living like this is probably not for you. While there are doors and windows that would probably block out invasive eyes and sounds (and would be useful if, as when I was there, there's a heavy snorer down the hall), in the summer, they're pretty much useless. You should be prepared to have doors and windows open so that you can get air into your rooms, particularly since (unfortunately) the owners have covered most of the small windows in the bedrooms with gorgeous Moroccan lanterns - it gives a beautiful aesthetic to the room, but doesn't do much for sleeping on hot days.
Nevertheless, this is a very lovely riad, and if you're up for what it involves, you'll really enjoy your stay.